Molding apparatus.



No. 726,515.' PATBNTBD APR. 28, 1903.

c. M. DAY. Mo-LDING APPARATUS.

APPLICATION FILED 00T. 7, 1901.

l No MODEL.

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CI-ItARLES M. DAY, OF HCPEDALE, MASSACHUSETTS, ASSIGNOR TO DRAPER-COMPANY, OF PORTLAND, MAINE, AND HOPEDALE, MASSACHUSETTS.

lllOLDlhlG APPARATUS.

SPECIFICATION forming pars f :Letters Patent No. 726,515, dated April28, 19031.

. Application led October 7,1901- Serial No. 77,834. (No model.)

To @ZZ whom, t may concern.-

Beit known that I, CHARLES M. DAY, a citizen of the United States,residing at Hopedale, in the county of Worcester and State ofMassachusetts, have invented an Improvement in Molding Apparatus,ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

lo This invention relates to that type of machine-molding apparatuswherein the pattern is supported by or secured to a so-called vibratorframe, shaped exteriorly to correspond with the match-frame upon whichit rests and with the drag and cope flasks, the vibrator-framebeinginterposed between said flasks and vibrated preparatoryto theremoval of the cope and afterward when the pattern is drawn from thedrag, one form of such type zo of apparatus being shown in United StatesPatent No. 654,292, dated July 24E, 1900. As the frame rests directlyupon the drag-ask and in turn supports the weight of the cope, thefriction is considerable on the contacting 25 surfaces of the severalparts, so that the response of the frame to tapping is very sluggish,and to set up sufficient vibratcry motion therein to properly separate`the pattern from the sand quite heavy blows must be struck 3o by thevibrating device, one well-known form of which is operated by compressedair. In practice the slighter the vibration of the pattern-supporting orvibrator frame to enable it to be withdrawn from the sand the better 3 5and more accurate the mold, and in my present invention I have providedmeans for sustaining the vibrator-frame in such manner that it isreadily and quickly responsive to very slight blows, and preferably theframe 4o is sustained at its corners.

In the present embodiment of my invention the vibrator-frame is adaptedto be sustained in a yielding manner between the drag and cope flasksbefore their separation, so that the least jar or blow thereupon willset up sufcient vibration in the frame, and the means sustaining saidframe will act promptly to restore it to its normal position orfl intothe exact position it occupied when the sand was 5o rammedupon it.

Figure l, in plan view, shows a vibraton frame illustrating my inventionin one of the best forms now known to me; and Fig. 2 is a side elevationof the same, partly broken out,

to show more clearly one of the yielding supports, the drag and copeflasks being indicated by dotted lines.

The vibrator-frame A, having ears d by which to handle the same, andsupporting within it the pattern a and gaten?, are and 6o may be all asusual in molding apparatus of the type referred to, a vibrator V beingshown attached to the frame.

In accordance with my invention- I provide the frame, which is or may beof any usual or suitable shape, with widely-separated supports b,preferably composed of india--rubber or other elastic or resilient andyielding 1naterial, the ends of the supports, herein shown ascylindrical plugs, projecting slightly beyond 7e each face ofthe frameand secured in holes in the latter, the supports being shown as arrangedsymmetrically.

When the ends of the supports contact with the opposed edges of the dragand cope flasks D and C, respectively, as shown in Fig. 2, the vibratorframe when the mold is finished may be readily vibrated or moved by avery slight blow or series of blows, the supports yielding readily tosuch vibrational move- 8o ment, and the natural resiliency of thesupports will act immediately upon stoppage of the vibrator to returnthe frame and pattern into substantially the exact position occupiedwhen the drag or the cope were rammed.

VInstead of making the supports'of indiarubber they might be made ofmetal in the form of spiral or other springs.

Having fully described my invention, what I claim as new, and desire tosecure by Letters 9o Patent, is

A vibrator-frame for molding apparatus, having symmetrically-arrangedelastic supports mounted thereon and projecting beyond the oppositefaces thereof.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

CHARLES M. DAY.

Witnesses:

GEORGE Oris DRAPER, ERNEST W. Woon.

